Are they directly related? Does a fasted state provide a boost for the immune system?
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A fasted state can indeed have some effects on the immune system. explains that intermittent fasting and even longer fasts are associated with brief improvements in the function of the innate immune system. This is largely because fasting can increase the release of epinephrine and cortisol, which can enhance alertness and activate certain immune functions, though excess can lead to chronic stress, potentially suppressing the immune response if not managed correctly 1 2 3 4.
However, it's important to balance fasting with adequate nutrition and stress management to avoid compromising your health. notes that while fasting can support the immune system in the short term, chronic stress from prolonged fasting or undernutrition can ultimately weaken immune function and harm overall health 2 4.
Thus, while fasting may offer some immune benefits, it should be practiced thoughtfully, ensuring nutritional needs are met and stress levels are moderated.
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